Compressor



Dec. 30, 1924-. 1 ,521,021

F. D. HQLDSWORTH I v I COMPRESSOR brig-i113]: File d June 1, 1920 pressor cylinder.

Patented Dec. 30, 1924.

unit-an FRED D. HOLDSWORTH, F OLAREMONT, NEXV HAMPSHIRE, ASSIG NOR TO SULLIVAN A, GOBIPOBATIQN 3'3? MASSACHUSETTS oomrnnsson.

Applicationfiled June 1, 1920, Serial No. 385,720. Renewed March 8, 1924.

T 0 all whom it may concern:

Be it known that I, FRED D. Honnswonrri, a citizen of the United States, residing at Clare-mont. in the county of Sullivan and State of New Hampshire, have invented certain new and useful Improvements in Compressors, of which-the following is a full, clear, and exact specification.

My invention relates to lubricating systems, and particularly to lubricating systems well adapted for use with compressors.

It has among its objects to, provide improvedmea-ns for preventing the entry of excessoil from the crank case into the com- A further object of my invention is to provide an improved and simplified means of the character set forth especially-adapted to use in connection with vertical compressors and which, while giving'ample space for the movement of the connecting rod and permitting ready connection thereof, provides only a small aperture surrounding the rod and yet the ample supplementary breathing space requisite to prevent oil suction through the connecting rod aperture. I

In the accompanying drawings, I have shown for purposes of illustration one embodiment which my invention may assume in practice.

In these drawings,

Fig. 1 is a sideelevation partially in section ofa duplex compressor equipped with my improvement. I

Fig. 2 is a transverse sectional view on line 22 .of Fig. 1, with certain parts broken away. V

Fig. 3 is a detail sectional view on line In this illustrative construction, I have shown a duplex. vertical compressor com prising a plurality of cylinders '1 having singleacting pistons 2 movable therein, the pistons being operatively connected through connecting rods "3 and theirjournals 4 to crank pins5 on asuitable crank shaft 6, the latter journaled ina crank casing 7 on which'the cylinders are'directly seated. As in a usual construction, lubricant, preferably under pressure, is also supplied through passages 8 and 9 in the. crank pins to'the journals 4, the lubricant herein being prevented from finding its way into the cylinders by improved baffle means hereinafter descri ed.

This means is shown herein to comprise a plurality of plates 10 disposed beneath each cylinder and having overlapping adjacent edges 11 and cooperating cut-away portions 12 in their adjacent sides and between their overlapping portions, which cut-away portions cooperate to forma narrow elongated slot for the connecting rod 3 of each piston. As shown, this slot is preferably of such length asto permit the piston rod to move freely and of such narrow width as not to extend out to the edges of the bearings 4. These plates 10 are also preferably bowed or bent upward in the center as shown in l, and are so disposed inthe top of the crank casing and between the latter and the bottonrof the cylinder as to form an obstruction or baffle, minimizing the entry of excess oil from the connecting rod journals into the lower end of the cylinder. More particularly, it will be noted that the overlapping portions 11 of the two plates 10 provided beneath each cylinder (Fig. 2) are notched at their ends at 13 and held by single screws '14 carried on dependin lugs 15 on the top and inside of the crank casing and disposed at each side of the connecting rod opening. Each ofthese plates 10 is; also preferably provided with a bent-up portion or lip 16 on each of its ends, the bent-up portions being suitably clamped, as by screws 17, to other spaced depending lugs lSlikewise formed on the top of the crank casing and projecting downward thereinto. As shown, each of these plates 10 is also so spaced apart at three sides from the crank casing as to form a marginal space 20, thereby permitting any excess oil which may find its way into the cylinder, to pass back into the crank case and also permit-ting thede'sired free breathing of thepiston and the consequent reduction in thesuc-t-ion of oil laden air through the connecting rodopenings.

In the operatlon of my improvedconstrue tion, the oil, which is'supplied'tothe'pas sages 8 and 9, as usual finds its way out on to the connecting rod journals t,'fro-m which .it is thrown off centrifugally as the crank bulk of the excess oil which would otherwise the mar 'inal siaces 2O permitting a tree a. l L flow of air to and from the piston. l ne to their location at the sides of the journals at, it will be noted that it is made possible to provide an air flow through these marginal spaces which is relatively free from oil and which, at the same time, is o't such volume as to redu e the suction through the connecting rod openings and the consequent tendency for oil laden air to be drawn up through these openings into the cylinders. Here attention is also directed to the fact that due to the bowed construction of the plates, any oil, which by chance should find its way on to the top of the plates 10, will follow the curvature of those plates and when accumulated sufiiciently at the lower ends thereof, flows off of the same into the marginal spaces 20 and therethrough back to the crank case.

Due to my improved construction, it will be observed that the connecting rod and piston may be readily disposed. in operative po sition in the compressor and the plates 10 operatively connected in the crank casing, the improved construction eliminating the necessity ior extra castings or special castings of a character calculated to increase the expense unduly or to interfere with the tree connection of the connecting red. It will also be observed that the plates may be supplied at a small expense and removed readily whenever, for any reason, it is desired to disconnect the connecting rods, it only being necessary to remove the connecting screws 14 and release the screws 13 to permit lateral movement and consequent treeing of each of the plates.

Vl hile I have in this application specifically described one form which my inven-- tion may assume in practice, it will be understood that this form of the same is shown For purposes of illustration and that the invention may be modified and embodied in other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In combination, a crank casing, a cylinder thereon, a piston in said cylinder, a crank shaft in; said casing, acQnl ecting rod connected between said shaft and said piston, and oil loaflie means between said crank casing and cylinder so constructed and arranged as to provide an aperture for said connecting rod and a spaced breathing space for said piston.

2. In combination, a crank casing supporting a cylinder, a piston in said cylinder,

a crank shaft in said crank casing, an operative connection between said crank shaft and said piston, and a plate carried be ween said crank casing and said cylinder so constructed and arranged as to provide an aperture through which said operative connection works and a spaced breathing opening.

3. In combination, a crank case supporting a cylinder, a piston in the latter, a crank shaft in said crank casing a connectng rod connecting said crank shaft and said piston, and a plate disposed between said crank casing and said cylinder presenting an aperture through which said connecti rod works and so supported relative to said crank casing and cylinder as to provide a breathing space for said piston at at least one lateral edge of said plate.

4. In a compressor, the combination of a cylinder, a piston therein, a crank casing, a crank shaft therein, a connecting rod connected between said shaft and said piston,

and a plate carried between said crank casing and said cylinder presenting a con necting rod aperture, and a peripheral breathing space for said piston.

5. In a compressor, the combination of cylinder, a piston therein, a crank casing, a crank shatt't therein, a connecting rod connected between said shaft and said piston. and a plurality of plates between said crank casing and said cylinder cooperating: to present a connecting rod aperture, at least one of said plates being so arranged with respect to said casing as to provide a breathing space spaced from said aperture.

6. In a compressor, the combination of a cylinder, a piston therein, a crank casing, a crank shaft therein, a connecting rod con nected between said shaft and said piston, and a plurality of plates between said crank casing and said cylinder cooperating to pre sent a connecting rod aperture and a plurality of breathing spaces for said piston.

7. In a compressor, the combination com prising a cylinder, a piston therein, a crank case connected to said cylinder, a crank shaft in said case, an operative connection between said shaft and piston, and a plurality of plates carried by said crank case and spaced apart from a wall thereof cooperating to present an aperture for said operative connection.

8. In a compressor, the combination comprising a cylinder, piston therein, a crank case connected. to said. cylinder, a crank shaft in said case, a connecting rod connecting said shaft and piston, and a plurality of plates carried by said crank case and spaced apart from a wall thereof cooperating to present an aperture for said connecting rod.

9. In a compressor, the comb-ination'comprising a cylinder, a piston therein, a crank case connected to said cylinder, a crank shaft in said case, a connecting rod connecting said shaft and piston, and a plurality of plates carried by said crank case and spaced apart from the side walls thereof cooperating to present an aperture for said connecting rod.

10. In a compressor, the combination comprising a cylinder, a piston therein, a crank case connected to said cylinder, a crank shaft in said case, a connecting rod connecting said shaft and piston, and a plurality of bowed plates carried in said crank case and spaced apart from certain of the walls thereof cooperating to present an aperture for said connecting rod.

11. In a compressor, the combination comprising a cylinder, a piston therein, a crank case supporting said cylinder, a crank shaft in said case, a connecting rod connecting said shaft and piston, and a plurality of bowed plates disposed beneath said cylinder overlapping at their adjacent edges and having portions cooperating to form a narrow aperture for said connecting rod.

12. In a compressor, the combination comprising a cylinder, a piston therein, a crank case supporting said cylinder, a crank shaft in said case, a connecting rod connecting said shaft and piston, and a plurality of bowed plates disposed beneath said cylinder overlapping at their adjacent edges and spaced apart at their opposite sides from the walls of said case, said plates cooperating to present a narrow aperture for said connecting rod.

13. In combination, a crank casing, havmg a top provided with an aperture therethrough whose dimensions are materially less than the dimensions of said top, a cylinder fixed to said crank casing with its bore opening through said aperture, a pis ton in said cylinder, a crank shaft in said crank casing, an operative connection between said piston and crank shaft, and means disposed below said top in said crank casing of greater dimensions than said cylinder bore, but of less dimensions than said top, said means having an opening therein through which said operative connection movesand cooperating with said crank casing to provide a tortuous breathing passage between the latter and said cylinder bore.

14. In combination, a crank casing carrying a cylinder, a piston in said cylinder, a crank shaft in said crank casilw, a connecting rod between said piston and and crank shaft, means spaced from the bottom of said cylinder and of greater dimensions than the cross sectional area of said cylinder and providing a slot through which said connecting rod moves, and means for supporting said last mentioned means in said crank casing in such manner as to provide a passage between at least one edge of said means and said crank casing through which said piston may breathe.

15. The combination including a cylinder, a piston therein, a crank casing, acrank sh aft therein, an operative connection between the shaft and piston, and partition forming means between the crank casing and cylinder providing an aperture through which said operative connection moves and also providing communication at a different point between said cylinder and crank casing to permit breathing, said partition forming means constituting oil baffle means.

In testimony whereof I affix my signature.

FRED HOLDSWORTH. 

